How many plane shapes do you have?
An infinite amount. It starts:
Point
Line
Triangle - 3 sides
Square - 4 sides
Pentagon - 5 sides
Hexagon - 6 sides
Heptagon - 7 sides
Octagon - 8 sides
Nonagon - 9 sides
Decagon - 10 sides
Hendacagon -11 sides
Dodecagon - 12 sides
.... Hectogon - 100 sides
.... Chiliagon - 1,000 sides
.... Myriagon - 10,000 sides
.... Hecatommyriagon - 1,000,000 sides
The list never ends.